Immaculate condition 1998 Sea Ray 400 Express Cruiser with CAT diesels and tender.  You won’t find another 40 ft $129k boat anywhere on the U.S. East Coast in such good condition inside and out.  

The long length, low profile, shallow draft, low vertical (bridge) clearance, and high speed of this boat make it the perfect boat for many coastal and offshore scenarios.  Your time is valuable - this boat will get you to your destination quickly, economically, and turn heads along the way!

Powered by the highly desired late model 350 hp Caterpillar 3116 diesel engines with low hours.  Only 14.3 gph at 28 mph / 24 knots.  

Upgraded in 2025 to be comfortable and functional at anchor / mooring for weeks.  The two stateroom layout and single bathroom with separate shower make her ideal for extended cruising or entertaining.  The water and holding tanks easily support a couple for a week (daily showers) before the need to visit a fuel dock.  The settee area pulls out to sleep additional guests.  

The 8 kW diesel generator with low hours powers the forward and main salon separate HVAC units (air conditioning and/or heat), as well as the water heater, stove, microwave, air fryer / oven / broiler, and refrigerator.  

All salon DC powered items (LED lights, USB outlets, water pump, head, etc.) including the refrigerator / freezer are powered by a 320 Ah LiFEPO4 (lithium) battery installed 2025.  The high capacity of the battery permits up to 48 hours of DC operation before the need to charge the battery with the generator or shore power.  Daily charging of only 2.5 by generator is sufficient for long term off-grid living.  

Anchor in confidence anywhere in the Atlantic Intracoastal Waterway (AICW), Florida Keys, Bahamas, Caribbean.  The anchor and rode was upgraded in 2025 to a Rocna Mk II 25 (55 lb) galvanized (one size larger than recommended for the boat), and a rode consisting of 150 ft of 5/16” HT / G4 galvanized chain spliced to 100 ft of 5/8” nylon rope.  The Lofrans Progress.1 windlass confidently deploys and retrieves the anchor and rode.  A chain locker stores the rope and chain.  

A new inflatable tender and outboard confidently transports 3+1 people from boat to shore. The 17” inflation tubes keep everyone dry during high wind conditions.  The tender stores in a simple davit on the aft of the Sea Ray. 

Helm navigation electronics include 2x Garmin chartplotters, sonar (fish finder), and radar.  Everything you need to safely travel day or night. 

The recent professional survey conducted 15 August 2025 verifies the excellent condition of this boat.  

Boat Specifications

LOA: 45.6 ft

Beam: 13 ft

Vertical clearance:  8 ft 4”

Draft: 3.3 ft

Dry weight: 18,000 lbs

Fuel:  300 gal    (400 mi range @ 28 mph / 24 knots & 14.3 gph)

Water:  100 gal

Holding: 30 gal

Staterooms:  2x  (1x master, 1x guest).  Plus the salon sofa converts into 2x adult sleeping area. 

Head:  Separate shower, sink, Vacuflush toilet, etc.  

Propulsion

No of Engines: 2

Type:  Diesel inboard direct drive

Engine Make: Caterpillar

Engine Model: 3116

Horsepower: 350 hp each

Engine Hours:  < 900 hours each engine

Transmission:  ZF Marine 220A1

Port Engine:  2x Group 31 AGM starting batteries purchased September 2025

Stbd Engine: 2x Group 31 deep cycle batteries purchased September 2025

Shaft:  2” stainless steel with dripless shaft seal systems. 

Fuel Filtering: Two (2) Racor 75/1000-MAX Primary fuel filter/water separators

Propeller: Two (2) bronze alloy, four-bladed 24'' x 18 pitch propellers with nuts/cotter pins.

Max cruising speed: 2400 rpm

Rated speed: 2800 rpm

Total fuel consumption is 14.3 gph at 28 mph / 24 knots

Generator

Make: Westerbeke 

Model: 8.0 BDT

Type: diesel generator

Capacity: 8 kW

Hours: < 800 hours. 

Tender

Year Mfg: 2025

Make: Highfield

Model: CL-260

Type: Inflatable with 17” dia tubes

Material: ORCA® Hypalon

LOA: 8’ 6”

Beam: 5’ 7”

Capacity:  3+1 people 

Weight: 119 lbs

Davit:  Adventure Marine C-Ring Davit System / Dinghy Hauler Davit  (2025)

Safety: 2x life jackets, signaling device (whistle)

Lighting: Navisafe Polelight Pack, Model: NS763, 2 nm range

Anchor: beach screw anchor

Manual bilge pump

Tender Outboard

Model Year: 2025

Make: Tohatsu

Model: MFS6DWDS

Horsepower:  6 hp

Shaft: short (15”)

Engine Type: 1-Cylinder, 4-Stroke

Starting: pull

Weight: 58 lbs

Fuel: Gasoline

Deck & Hull

Swim platform with swim ladder

Tender Davit:  Adventure Marine C-Ring Davit System / Dinghy Hauler Davit  (2025)

Fenders: 4x

Docking Lines: 6x 5/8”

Windless:  Lofrans Progress.1

Anchor: Rocna Mk II 25 (55 lb) anchor (one size up for boat length) coupled to Kong  8-12 644.10 swivel anchor connector, then 150 ft 5/16” HT / G4 Chain and finally 100 ft of 5/8" 3-strand nylon line. Suncor anchor subber hooks with 6 ft of 5/8” line 

Fishing Anchor: Marpac fixed grapnel / wrech 12 lb anchor with 150 ft of 1/2” nylon rode is used.  A retrieval ball (never used) is also included. 

Aft fresh water shower (after swimming/snorkeling)

Radar arch supporting radar dome, antennas, lights, etc.

Tempered glass windshield by Taylor Made with three windshield wipers.

Searchlight: ACR Electronics RCL-100 remote controlled search light.

Isinglass enclosure redone 2023

Helm

VHF: Standard Horizon Eclipse

Chartplotters: Two Garmin chartplotters (GPSMPA 1042xsv and GPSMAP 742xs) with BlueChart US+Canada+Bahamas maps and 5,000 waypoint and 100 route capability.  

Sonar: Garmin

Radar: Garmin

Compass: Ritchie 4" Compass

Signaling:  Electric horn + bell

Map holder

Ventilation: Electronic center window vent

Seating: Bench port & starboard with room for 2x adults

Steering: Hydraulic

Trim Tabs: Hydraulic

Autopilot:  Raytheon Raypilot 650 Autopilot (doesn’t work)

Searchlight: Remote control for ACR Electronics RCL-100 search light.

Cockpit & Aft Social Area

Icemaker and sink

Seating for ~ 10 people. 

Interior Systems & Equipment

Hatch & door covers with noseeum screening

Heat & AC: Two (2) Cruisair Marine Air units. 8,000 BTU & 8,000 BTU with digital controls.

Lighting: 12 VDC LED lighting + 120 VAC lighting throughout

Galley / Dinette

Refrigerator / Freezer: Isotherm CR195 by Indel Marine

Range: Kenyon triple burner stove with ceramic glass cooktop.

Microwave: Toshiba (new December 2025)

Combination Air Fryer / Broiler / Oven (new December 2025)

Built in blender

Single sink with fresh water supply

Counter with 2x portable stools

Seating: Large semi-circular salon sofa plus two portable seats for eating and entertainment.  

Dinette table

Stereo: Pioneer DEH-X stereo (unit located in cabin, speakers in cabin and cockpit)

2x DC powered USB outlets with 1x USB A and 2x USB C high power charging capability. 

3x DC cigarette lighter outlets.

Head

Sink with fresh water and drain

Dometic Vacuflush waste disposal system 

HVAC ventilation from forward system

12 VDC LED lighting

Hatch in the ceiling

Separate enclosed shower

Powered exhaust for the shower

Master Stateroom

Queen size bed with easy access from the front and sides.

12 VDC LED lighting

2x closets

3x storage for shoes, etc.

Storage under the bed

TV with WiFi / streaming capability

Overhead large hatch with screen and shade

Guest Stateroom

2x adult size bunks

Overhead hatch with screen and shade

Cabinet with storage

Storage available under lower bunk

Engine Room

Electronic oil drain system for each engine and the generator

3x Rule 2000 GPH bilge pumps with automatic float switches

Powered ventilation

Fuel tanks: 2x 152 gal aluminum diesel tanks

Fresh water:  100 gal

Fuel Filtering: Two (2) Racor 75/1000-MAX Primary fuel filter/water separators

Electrical

Shore power: 2x 120 VAC 30 A shore power outlets

Shore power cords: 2x 50 ft 120 VAC / 30 A (new September 2025)

AC-DC Battery Charger: NOCO 3-Bank 15A Onboard Battery Charger gen5x3 (new Oct 2025)

Galvanic Corrosion Protection System: 

12 VDC LiFePO4 320 Ah battery to power all cabin systems. 

LiFEPO4 AC-DC battery charger (separate breaker on panel labeled “LiFEPO4 CHG”) (new Oct 2025)

Water Heater: 11 gal, 120 VAC,  AO Smith

Safety

Throwable floatation devices: 3x

Wearable floatation devices: 4x on Knot Again, 2x in the tender.

Engine room: Halon 1301 Fixed Fire Suppression Tank with automatic thermal activation.

Cabin CO + Smoke Alarms: 1x in guest room and 1x in master stateroom (new Oct 2025)

Cabin fire extinguishers: (new Oct 2025)

Flares:  (new Oct 2025)

Spare Parts & Service Tools

CAT 3116 Engine(s):

- Raw / sea water pump impellers

- Engine zinc anode sets

- Primary fuel filters

- Secondary fuel filters (engine mounted)

- Engine oil filters

Fynspray Sump Pump, Brass with Rubber Seals (for changing transmission oil).

Pittsburgh 10 ton 3 jaw hydraulic gear puller (for pulling propellers).

Vacuflush pump:  Dometic/Sealand VGII Pump Assy - 12VDC P/N 385310774

Vacuflush 385310076 Duckbill Valve (4 Pack), 385310151 O-Ring (2 Pack), 385316140: bowl seal. 

Vent carbon filter

Fresh water pump:  Wassermann Model 3WDP4-45-12 | 4.0 GPM / 15.0 LPM 

What Doesn’t Work

Autopilot

This turnkey liveaboard boat is ready to go.  The recent professional survey conducted 15 August 2025 verifies the excellent condition of this boat.